Interplay of quantum phase transition and flat band in hybrid lattices

24 Sep 2020 Zhu Gui-Lei Ramezani Hamidreza Emary Clive Gao Jin-Hua Wu Ying Lü Xin-You

We investigate the interplay of superradiant phase transition (SPT) and energy band physics in an extended Dicke-Hubbard lattice whose unit cell consists of a Dicke model coupled to an atomless cavity. We found in such a periodic lattice the critical point that occurs in a single Dicke model becomes a critical region that is periodically changing with the wavenumber $k$... (read more)

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